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Magento Signature verification bypass

High severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Jan 19, 2024

Package

composer magento/community-edition (Composer)

Affected versions

< 2.3.4-p2

Patched versions

2.3.4-p2
composer magento/core (Composer)
< 1.9.4.5
1.9.4.5

Description

Magento versions 2.3.4 and earlier, 2.2.11 and earlier (see note), 1.14.4.4 and earlier, and 1.9.4.4 and earlier have an observable timing discrepancy vulnerability. Successful exploitation could lead to signature verification bypass.

References

Published by the National Vulnerability Database Jun 26, 2020
Published to the GitHub Advisory Database May 24, 2022
Reviewed Jan 10, 2024
Last updated Jan 19, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.119%
(47th percentile)

Weaknesses

CVE ID

CVE-2020-9588

GHSA ID

GHSA-j2r4-2cr6-h3r3

Source code

No known source code
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